/*****************************************************************************
 *   Copyright 2005 Tim A Wang
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 ****************************************************************************/
package com.jb.web.application;

import com.jb.framework.PersistentContext;


/**
 * Command interface that used to execute a user command. Implemented by Link.
 *
 *
 * @author anpwang
 * @version $0.1$
 */
public interface Command {
    /**
     * Returns command
     *
     * @return command name
     */
    public String getCommand();

    /**
     * Called to perform the commmand
     *
     * @param ctx context for the command.
     *
     * @return true if succeeded.
     */
    public boolean execute(PersistentContext ctx);
}
